I think one of the greatest joys as a mother is watching your children become best friends. To know that your children will be life-long allies, to know they will always be there for each other, in good times and in times of heartache. That they will always have each other for support and encouragement. To know that they will always have the greatest bond that only siblings can have. They share their childhood memories, they share your love. They are all pieces of you. There is no greater gift you can give to your child, than the gift of siblings. They may not always agree, but their love and friendship for each other bonds them together for a lifetime.